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Old Aug 30, 2010, 12:12 AM
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To be honest, right now, I am not suspecting that the PS is the issue. The Iota DLS-55 unit is brand new and noted for it's consistent output. I am also trying to run the PS at less than it's rated output. The PS is spec'd to put out 13.4v nominal - my multimeter says it is putting out 13.5 consistently. The PL8 say it is recieving 14.4 consistently. I am not sure why the PL8 is reading that extra volt. I'm sure my mm would be picking that up or if it was varying between 13.5 to 14.4 then the PL8 input should be showing that (or some) variation. I think something else is limiting me from charging up to 22amps (right now I am only at 16amps with two 6s packs). These packs have a high C rating (40C).

Has anyone else been successful parallel charging 6S 30+C packs with 12v up to the rated limit of the PL8? (500w)
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Old Aug 30, 2010, 07:26 AM
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United States, OH, Cleveland
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Try a car battery.
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Old Aug 30, 2010, 07:42 AM
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Quote:
Originally Posted by JIM CALDWELLA View Post
Try a car battery.
Run the PL8 straight off the car battery and see if I can get the twenty amps. Thats a great idea, and simple to do. I definitely will try that.

I am also going to try and run my PL8 and my 10s at 10 amps each off the same PS and see what happens.
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Old Aug 30, 2010, 07:43 AM
Southern Pride
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Haralson County GA. USA
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I am not sure that a typical car battery is going to be very happy with a 40 to 50 amp. load on it for more than 30 seconds. 15 minutes will discharge it way deeper than is enough to seriously shorten its' life. That is why I suggested such in parallel with the IOTA in parallel a while back.


Charles
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Old Aug 30, 2010, 07:51 AM
Southern Pride
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Haralson County GA. USA
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Quote:
On one charge it was interuptd with Safety Code#4 - Power Supply unstable?
Along with Safety code 85 or other Safety Code numbers are errors which the PL8 has captured and can be sent tio FMA to help locate and correct programing bugs.

Some will be false as when PL8 indicates soft start on power up or if you remove the battery without stopping the charge first etc. No point in sending these but when a charge is going normal and then an Error Code comes up and the charge stops then yes send the Error Dump. No point in sending the same one over and over each time it comes up if it keeps happening(repeating ) however.

Charles
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Old Aug 30, 2010, 09:10 AM
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Florida
Joined Nov 2002
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have to constantly keep an eye on the PL8 when charging high power as it
stops for no reason... Safety Code#4 - Power Supply unstable

It cannot be my generator or power supply since I use other chargers with no issues charging same packs.

I can have iCharger 3010B charger and smaller iCharger 208B and cellpro 4 gold going at the same time to charge several single packs for my lipos, but even tried having the PL8 alone with no other charges going to charge single one pack and it always stops early with error.. PL8 doesnt complain when I keep it at charge rate of 15A

Cant sit watching so I unplug from PL8 and let the icharger continue charging at 25A (5C) with no issues...


I hope firmware will fix this soon...

Honda EU2000i generator
Mastech Power Supply HY3050EX
hyperion vx 5000 6S packs at 5c

PL8 (using all fma gear & fused charge leads)
iCharger 3010B
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Old Aug 30, 2010, 09:39 AM
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The PL8 fans do not turn on as much as other chargers I had in the past. Is this normal for the PL8?
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Old Aug 30, 2010, 09:54 AM
Southern Pride
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Haralson County GA. USA
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Quote:
Originally Posted by gww528 View Post
The PL8 fans do not turn on as much as other chargers I had in the past. Is this normal for the PL8?

Yes it is completely normal. PL8 has a rather massive heat sink and if not being ran at high power often the fans do not come on at all. I believe that the combination of heat sink and fans are rated at 200 watts. One of the beta team members in fact disconnected one of the fans in order to force it to run warm enough to do some testing at increased temperatures. His still functioned without any issues other than reducing the charge rate as it reached elevated temperatures just as it is designed to do.

Charles
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Old Aug 30, 2010, 01:02 PM
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Charles,
Just want to confirm. Is this the correct wiring diagram to hook-up the battery in parallel?
Thanks!



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Old Aug 30, 2010, 01:09 PM
Southern Pride
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Haralson County GA. USA
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Correct.

Charles
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Old Aug 30, 2010, 03:45 PM
Mis-guided heli guy
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Austin, TX USA
Joined Mar 2007
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hmm running a battery in parallel got me thinking about my generator..
My Yamaha 1000 inverter generator cannot keep up with the demands of 5S charging at 30amps (24v PS). I can only charge at about 23 amps without the generator tripping.

Would it be possible to run two smaller 7ah gel cells in series hooked up in parallel with my PS (24.7v output) to power the PL8? Or is that a bad idea?
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Old Aug 30, 2010, 04:05 PM
Southern Pride
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Haralson County GA. USA
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Most likely a bad idea as the 7Ah ones would end up getting discharged and recharged a lot faster than they should be and likely would not last very long. I try not to discharge my 125Ah flooded cells deep cycles over around 20% beween recharging them and that is why they are still doing well after 3 years of heavy(frequent) useage.

Charles
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Old Aug 30, 2010, 05:48 PM
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Stuarts Draft, Virginia
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My PL8 combo got here today. Gonna give it a whirl tonight with a 13.8v 35A PS.
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Old Aug 30, 2010, 06:02 PM
Mis-guided heli guy
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Austin, TX USA
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Quote:
Originally Posted by everydayflyer View Post
Most likely a bad idea as the 7Ah ones would end up getting discharged and recharged a lot faster than they should be and likely would not last very long. I try not to discharge my 125Ah flooded cells deep cycles over around 20% beween recharging them and that is why they are still doing well after 3 years of heavy(frequent) useage.

Charles
I wasn't planning on using the batteries as the sole power source - just using them inline with the PS to help buffer the demand from the PS. Still a bad idea? (essentially what drsmith751 was going to do)
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Old Aug 30, 2010, 07:13 PM
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I have completed a few tests.

I hooked up my 10S charger and PL8 off the power supply and was able to charge two packs in parallel at 10a each pack with the PS putting out around 45 amps. I had no Power Status limiting messages. It was interesting that the voltage read-out on the 10S said the incoming voltage was 13.6v (which matached my meter) and the PL8 says 14.4v. Why the difference?

I then hooked up a battery in parallel and was able to parallel charge with no limiting up to 486watts (full power). This would indcate that the battery was dampening the PS output. I am surprised that this PS would have that variable of an output. It is also curious why the limiting only occurs at higher output (approx 300w) and yet when I ran two chargers with the PS putting out like 600watts there was voltage was consistent.

Are others able to run two 6s 5000 at 10a (or similar) on 12v up to the max output? For us heli guys that a typical battery to use on some of the larger helis.
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